Playing GM - Extensions, Draft Selections & Free Agency

Lets take a look at the total offseason, including bringing in outside free agents, who gets ERFA and RFA tenders, contracted player extensions and a full 7 round mock draft.
Firstly, the cuts -
Jeremy Lane
Jon Ryan
Cliff Avril
Richard Sherman
That puts Seattle with the following cap space - $38,998,861
Trades -
Michael Bennett to Tampa Bay for a 5th (#146)
Earl Thomas to Atlanta for #26 and a 4th (#128)
Cap space now sits at - $49,673,861
With the draft board looking like this -
Round 1 - #18
Round 1 - #26
Round 4 - #122
Round 4 - #128
Round 5 - #143
Round 5 - #146
Round 5 - #150
Round 5 - #170
Round 7 - #226
Round 7 - #248
Round 7 - #250
Next up, extensions for players under contract for 2018 -
Duane Brown gets the following extension -
Duane Brown
4 years
$44m contract value
$13.5m Signing Bonus
$11m Average Per Year (APY)

K.J. Wright gets this extension -
K.J. Wright
4 years
$28m
$8m Signing Bonus
$7m Average Per Year

Frank Clark gets extended, too -
Frank Clark
4 years
$41m
$18m Signing Bonus
$10.25m Average Per Year

Cap space now sits at - $48,942,802
The following players that were on the team in 2017 but are scheduled to be unrestricted free agents get a new contract -
Sheldon Richardson
4 years
$40m
$10m Signing Bonus
$10m Average Per Year

The team decides to have Bradley McDougald take over at free safety and locks him up for 3 years and gives him a nice pay rise.
Bradley McDougald
3 year
$15.75m
$4m Signing Bonus
$5.25m Avergage Per Year

Luke Willson
2 years
$3.5m
$1.5m signing bonus
$1.75m Average Per Year

DeShawn Shead
1 Year
$1.2m
$200k Signing Bonus
$1.2m Average Per Year

With the UFA's done, that leaves the ERFA's and RFA's. As it stands, we have 44 players under contract for 2018.
J.D. McKissic (RB) gets an ERFA Tender, cap hit for 2018 is $630,000
Tyler Ott (LS) gets an ERFA Tender, cap hit for 2018 is $555,000
Quinton Jefferson (DT) gets an ERFA Tender, cap hit for 2018 is $630,000
Joey Hunt (C) gets an ERFA Tender, cap hit for 2018 of $630,000
Branden Jackson (DE) gets an ERFA Tender, cap hit for 2018 of $630,000
Onto the RFA's -
Justin Coleman went undrafted originally, so you can't put an 'original round tender' on him really, so a 2nd round gets put on him, cap hit for 2018 of $2,916,000
Dion Jordan was a 1st round pick, so you can use the 'original round tender' on him for a lower cap hit. His play will cost the team $1,908,000 in 2018
That's it for players that are extended early, brought back to the team as well as ERFA's and RFA's done.
The roster now sits at 51 players under contract with $27,510,469 in cap room for the draft and free agency.
Now onto Free Agency -
Carlos Hyde (RB)
2 year
$8.8m
$3m Signing Bonus
$4.4m Average Per Year
2018 cap hit of $4,200,000
Allan Robinson (WR)
3 year
$33m
$9m signing bonus
$11m Average Per Year
2018 cap hit of $7,600,000
Austin Seferian-Jenkins (TE)
1 year
$1.5m
$500k Signing Bonus
2018 cap hit of $1,500,000
Alex Okafor (DE)
1 Year
$2.75m
$1m Signing Bonus
2018 cap hit of $2,750,000
Cap space is now $11,460,469 with just the draft class to pay and keeping some dollars held back for mid season injuries.
Draft -
I'm going to make the following trades with our collection of draft picks -
Round 1 #18 gets traded to Cleveland for their second round (#33), third round (#65) and fifth round (#140)
Round 1 #26 and round 5 (#150) gets traded to Denver for their second round (40) and third round (#71)
Seattle trades up to round 3 (#86) with Kansas City for their Round 4 (#122), round 5 (#140) and round 7 (#226)
Their draft board now looks like this -
Round 2 - #33
Round 2 - #40
Round 3 - #65
Round 3 - #71
Round 3 - #86
Round 4 - #128
Round 5 - #143
Round 5 - #146
Round 5 - #170
Round 7 - #248
Round 7 - #250
That's 11 picks (exactly the same as last year) with a draft trade value of 1,878 points. They started off with a total of 1,012 points so provided a average portion of their selections prove to be hits, not misses, the draft class could add real value to the roster.
This draft class also costs the 2018 cap exactly $8,072,677.
The Seahawks select the following players in this years draft -
Round 2 - #33 - OG Isaiah Wynn
Round 2 - #40 - RB Ronald Jones II
Round 3 - #65 - EDGE Marcel Frazier
Round 3 - #71 - WR Michael Gallup
Round 3 - #86 - CB Quenton Meeks
Round 4 - #128 - EDGE - Trevon Young
Round 5 - #143 - RB Ito Smith
Round 5 - #146 - OLB Shaquem Griffin
Round 5 - #170 - OT Brandon Parker
Round 7 - #248 - P Michael Dickson
Round 7 - #250 - OLB - Hercules Mata'afa
Their 53 man depth chart would look as follows -
Red indicates rookie
Blue indicates outside FA
Offense -

Defense -

Special Teams -

This leaves $3,387,742 for mid season signings.